/* * Copyright (C) 2010 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #define LOG_TAG "SurfaceTexture" //#define LOG_NDEBUG 0 #define GL_GLEXT_PROTOTYPES #define EGL_EGLEXT_PROTOTYPES #include #include #include #include #include #include #include #include #include #include #include // This compile option causes SurfaceTexture to return the buffer that is currently // attached to the GL texture from dequeueBuffer when no other buffers are // available. It requires the drivers (Gralloc, GL, OMX IL, and Camera) to do // implicit cross-process synchronization to prevent the buffer from being // written to before the buffer has (a) been detached from the GL texture and // (b) all GL reads from the buffer have completed. #ifdef ALLOW_DEQUEUE_CURRENT_BUFFER #define FLAG_ALLOW_DEQUEUE_CURRENT_BUFFER true #warning "ALLOW_DEQUEUE_CURRENT_BUFFER enabled" #else #define FLAG_ALLOW_DEQUEUE_CURRENT_BUFFER false #endif // This compile option makes SurfaceTexture use the EGL_KHR_fence_sync extension // to synchronize access to the buffers. It will cause dequeueBuffer to stall, // waiting for the GL reads for the buffer being dequeued to complete before // allowing the buffer to be dequeued. #ifdef USE_FENCE_SYNC #ifdef ALLOW_DEQUEUE_CURRENT_BUFFER #error "USE_FENCE_SYNC and ALLOW_DEQUEUE_CURRENT_BUFFER are incompatible" #endif #endif // Macros for including the SurfaceTexture name in log messages #define ST_LOGV(x, ...) LOGV("[%s] "x, mName.string(), ##__VA_ARGS__) #define ST_LOGD(x, ...) LOGD("[%s] "x, mName.string(), ##__VA_ARGS__) #define ST_LOGI(x, ...) LOGI("[%s] "x, mName.string(), ##__VA_ARGS__) #define ST_LOGW(x, ...) LOGW("[%s] "x, mName.string(), ##__VA_ARGS__) #define ST_LOGE(x, ...) LOGE("[%s] "x, mName.string(), ##__VA_ARGS__) namespace android { // Transform matrices static float mtxIdentity[16] = { 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, }; static float mtxFlipH[16] = { -1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, }; static float mtxFlipV[16] = { 1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, }; static float mtxRot90[16] = { 0, 1, 0, 0, -1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, }; static float mtxRot180[16] = { -1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, }; static float mtxRot270[16] = { 0, -1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, }; static void mtxMul(float out[16], const float a[16], const float b[16]); // Get an ID that's unique within this process. static int32_t createProcessUniqueId() { static volatile int32_t globalCounter = 0; return android_atomic_inc(&globalCounter); } SurfaceTexture::SurfaceTexture(GLuint tex, bool allowSynchronousMode, GLenum texTarget, bool useFenceSync) : mDefaultWidth(1), mDefaultHeight(1), mPixelFormat(PIXEL_FORMAT_RGBA_8888), mBufferCount(MIN_ASYNC_BUFFER_SLOTS), mClientBufferCount(0), mServerBufferCount(MIN_ASYNC_BUFFER_SLOTS), mCurrentTexture(INVALID_BUFFER_SLOT), mCurrentTransform(0), mCurrentTimestamp(0), mNextTransform(0), mNextScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE), mTexName(tex), mSynchronousMode(false), mAllowSynchronousMode(allowSynchronousMode), mConnectedApi(NO_CONNECTED_API), mAbandoned(false), #ifdef USE_FENCE_SYNC mUseFenceSync(useFenceSync), #else mUseFenceSync(false), #endif mTexTarget(texTarget), mFrameCounter(0) { // Choose a name using the PID and a process-unique ID. mName = String8::format("unnamed-%d-%d", getpid(), createProcessUniqueId()); ST_LOGV("SurfaceTexture"); sp composer(ComposerService::getComposerService()); mGraphicBufferAlloc = composer->createGraphicBufferAlloc(); mNextCrop.makeInvalid(); memcpy(mCurrentTransformMatrix, mtxIdentity, sizeof(mCurrentTransformMatrix)); } SurfaceTexture::~SurfaceTexture() { ST_LOGV("~SurfaceTexture"); freeAllBuffersLocked(); } status_t SurfaceTexture::setBufferCountServerLocked(int bufferCount) { if (bufferCount > NUM_BUFFER_SLOTS) return BAD_VALUE; // special-case, nothing to do if (bufferCount == mBufferCount) return OK; if (!mClientBufferCount && bufferCount >= mBufferCount) { // easy, we just have more buffers mBufferCount = bufferCount; mServerBufferCount = bufferCount; mDequeueCondition.signal(); } else { // we're here because we're either // - reducing the number of available buffers // - or there is a client-buffer-count in effect // less than 2 buffers is never allowed if (bufferCount < 2) return BAD_VALUE; // when there is non client-buffer-count in effect, the client is not // allowed to dequeue more than one buffer at a time, // so the next time they dequeue a buffer, we know that they don't // own one. the actual resizing will happen during the next // dequeueBuffer. mServerBufferCount = bufferCount; } return OK; } status_t SurfaceTexture::setBufferCountServer(int bufferCount) { Mutex::Autolock lock(mMutex); return setBufferCountServerLocked(bufferCount); } status_t SurfaceTexture::setBufferCount(int bufferCount) { ST_LOGV("setBufferCount: count=%d", bufferCount); Mutex::Autolock lock(mMutex); if (mAbandoned) { ST_LOGE("setBufferCount: SurfaceTexture has been abandoned!"); return NO_INIT; } if (bufferCount > NUM_BUFFER_SLOTS) { ST_LOGE("setBufferCount: bufferCount larger than slots available"); return BAD_VALUE; } // Error out if the user has dequeued buffers for (int i=0 ; i= minBufferSlots) ? mServerBufferCount : minBufferSlots; return setBufferCountServerLocked(bufferCount); } if (bufferCount < minBufferSlots) { ST_LOGE("setBufferCount: requested buffer count (%d) is less than " "minimum (%d)", bufferCount, minBufferSlots); return BAD_VALUE; } // here we're guaranteed that the client doesn't have dequeued buffers // and will release all of its buffer references. freeAllBuffersLocked(); mBufferCount = bufferCount; mClientBufferCount = bufferCount; mCurrentTexture = INVALID_BUFFER_SLOT; mQueue.clear(); mDequeueCondition.signal(); return OK; } status_t SurfaceTexture::setDefaultBufferSize(uint32_t w, uint32_t h) { ST_LOGV("setDefaultBufferSize: w=%d, h=%d", w, h); if (!w || !h) { ST_LOGE("setDefaultBufferSize: dimensions cannot be 0 (w=%d, h=%d)", w, h); return BAD_VALUE; } Mutex::Autolock lock(mMutex); mDefaultWidth = w; mDefaultHeight = h; return OK; } status_t SurfaceTexture::requestBuffer(int slot, sp* buf) { ST_LOGV("requestBuffer: slot=%d", slot); Mutex::Autolock lock(mMutex); if (mAbandoned) { ST_LOGE("requestBuffer: SurfaceTexture has been abandoned!"); return NO_INIT; } if (slot < 0 || mBufferCount <= slot) { ST_LOGE("requestBuffer: slot index out of range [0, %d]: %d", mBufferCount, slot); return BAD_VALUE; } mSlots[slot].mRequestBufferCalled = true; *buf = mSlots[slot].mGraphicBuffer; return NO_ERROR; } status_t SurfaceTexture::dequeueBuffer(int *outBuf, uint32_t w, uint32_t h, uint32_t format, uint32_t usage) { ST_LOGV("dequeueBuffer: w=%d h=%d fmt=%#x usage=%#x", w, h, format, usage); if ((w && !h) || (!w && h)) { ST_LOGE("dequeueBuffer: invalid size: w=%u, h=%u", w, h); return BAD_VALUE; } status_t returnFlags(OK); EGLDisplay dpy = EGL_NO_DISPLAY; EGLSyncKHR fence = EGL_NO_SYNC_KHR; { // Scope for the lock Mutex::Autolock lock(mMutex); int found = -1; int foundSync = -1; int dequeuedCount = 0; bool tryAgain = true; while (tryAgain) { if (mAbandoned) { ST_LOGE("dequeueBuffer: SurfaceTexture has been abandoned!"); return NO_INIT; } // We need to wait for the FIFO to drain if the number of buffer // needs to change. // // The condition "number of buffers needs to change" is true if // - the client doesn't care about how many buffers there are // - AND the actual number of buffer is different from what was // set in the last setBufferCountServer() // - OR - // setBufferCountServer() was set to a value incompatible with // the synchronization mode (for instance because the sync mode // changed since) // // As long as this condition is true AND the FIFO is not empty, we // wait on mDequeueCondition. const int minBufferCountNeeded = mSynchronousMode ? MIN_SYNC_BUFFER_SLOTS : MIN_ASYNC_BUFFER_SLOTS; const bool numberOfBuffersNeedsToChange = !mClientBufferCount && ((mServerBufferCount != mBufferCount) || (mServerBufferCount < minBufferCountNeeded)); if (!mQueue.isEmpty() && numberOfBuffersNeedsToChange) { // wait for the FIFO to drain mDequeueCondition.wait(mMutex); // NOTE: we continue here because we need to reevaluate our // whole state (eg: we could be abandoned or disconnected) continue; } if (numberOfBuffersNeedsToChange) { // here we're guaranteed that mQueue is empty freeAllBuffersLocked(); mBufferCount = mServerBufferCount; if (mBufferCount < minBufferCountNeeded) mBufferCount = minBufferCountNeeded; mCurrentTexture = INVALID_BUFFER_SLOT; returnFlags |= ISurfaceTexture::RELEASE_ALL_BUFFERS; } // look for a free buffer to give to the client found = INVALID_BUFFER_SLOT; foundSync = INVALID_BUFFER_SLOT; dequeuedCount = 0; for (int i = 0; i < mBufferCount; i++) { const int state = mSlots[i].mBufferState; if (state == BufferSlot::DEQUEUED) { dequeuedCount++; } // if buffer is FREE it CANNOT be current LOGW_IF((state == BufferSlot::FREE) && (mCurrentTexture==i), "dequeueBuffer: buffer %d is both FREE and current!", i); if (FLAG_ALLOW_DEQUEUE_CURRENT_BUFFER) { if (state == BufferSlot::FREE || i == mCurrentTexture) { foundSync = i; if (i != mCurrentTexture) { found = i; break; } } } else { if (state == BufferSlot::FREE) { /* We return the oldest of the free buffers to avoid * stalling the producer if possible. This is because * the consumer may still have pending reads of the * buffers in flight. */ bool isOlder = mSlots[i].mFrameNumber < mSlots[found].mFrameNumber; if (found < 0 || isOlder) { foundSync = i; found = i; } } } } // clients are not allowed to dequeue more than one buffer // if they didn't set a buffer count. if (!mClientBufferCount && dequeuedCount) { ST_LOGE("dequeueBuffer: can't dequeue multiple buffers without " "setting the buffer count"); return -EINVAL; } // See whether a buffer has been queued since the last // setBufferCount so we know whether to perform the // MIN_UNDEQUEUED_BUFFERS check below. bool bufferHasBeenQueued = mCurrentTexture != INVALID_BUFFER_SLOT; if (bufferHasBeenQueued) { // make sure the client is not trying to dequeue more buffers // than allowed. const int avail = mBufferCount - (dequeuedCount+1); if (avail < (MIN_UNDEQUEUED_BUFFERS-int(mSynchronousMode))) { ST_LOGE("dequeueBuffer: MIN_UNDEQUEUED_BUFFERS=%d exceeded " "(dequeued=%d)", MIN_UNDEQUEUED_BUFFERS-int(mSynchronousMode), dequeuedCount); return -EBUSY; } } // we're in synchronous mode and didn't find a buffer, we need to // wait for some buffers to be consumed tryAgain = mSynchronousMode && (foundSync == INVALID_BUFFER_SLOT); if (tryAgain) { mDequeueCondition.wait(mMutex); } } if (mSynchronousMode && found == INVALID_BUFFER_SLOT) { // foundSync guaranteed to be != INVALID_BUFFER_SLOT found = foundSync; } if (found == INVALID_BUFFER_SLOT) { // This should not happen. ST_LOGE("dequeueBuffer: no available buffer slots"); return -EBUSY; } const int buf = found; *outBuf = found; const bool useDefaultSize = !w && !h; if (useDefaultSize) { // use the default size w = mDefaultWidth; h = mDefaultHeight; } const bool updateFormat = (format != 0); if (!updateFormat) { // keep the current (or default) format format = mPixelFormat; } // buffer is now in DEQUEUED (but can also be current at the same time, // if we're in synchronous mode) mSlots[buf].mBufferState = BufferSlot::DEQUEUED; const sp& buffer(mSlots[buf].mGraphicBuffer); if ((buffer == NULL) || (uint32_t(buffer->width) != w) || (uint32_t(buffer->height) != h) || (uint32_t(buffer->format) != format) || ((uint32_t(buffer->usage) & usage) != usage)) { usage |= GraphicBuffer::USAGE_HW_TEXTURE; status_t error; sp graphicBuffer( mGraphicBufferAlloc->createGraphicBuffer( w, h, format, usage, &error)); if (graphicBuffer == 0) { ST_LOGE("dequeueBuffer: SurfaceComposer::createGraphicBuffer " "failed"); return error; } if (updateFormat) { mPixelFormat = format; } mSlots[buf].mGraphicBuffer = graphicBuffer; mSlots[buf].mRequestBufferCalled = false; mSlots[buf].mFence = EGL_NO_SYNC_KHR; if (mSlots[buf].mEglImage != EGL_NO_IMAGE_KHR) { eglDestroyImageKHR(mSlots[buf].mEglDisplay, mSlots[buf].mEglImage); mSlots[buf].mEglImage = EGL_NO_IMAGE_KHR; mSlots[buf].mEglDisplay = EGL_NO_DISPLAY; } if (mCurrentTexture == buf) { // The current texture no longer references the buffer in this slot // since we just allocated a new buffer. mCurrentTexture = INVALID_BUFFER_SLOT; } returnFlags |= ISurfaceTexture::BUFFER_NEEDS_REALLOCATION; } dpy = mSlots[buf].mEglDisplay; fence = mSlots[buf].mFence; mSlots[buf].mFence = EGL_NO_SYNC_KHR; } if (fence != EGL_NO_SYNC_KHR) { EGLint result = eglClientWaitSyncKHR(dpy, fence, 0, 1000000000); // If something goes wrong, log the error, but return the buffer without // synchronizing access to it. It's too late at this point to abort the // dequeue operation. if (result == EGL_FALSE) { LOGE("dequeueBuffer: error waiting for fence: %#x", eglGetError()); } else if (result == EGL_TIMEOUT_EXPIRED_KHR) { LOGE("dequeueBuffer: timeout waiting for fence"); } eglDestroySyncKHR(dpy, fence); } ST_LOGV("dequeueBuffer: returning slot=%d buf=%p flags=%#x", buf, mSlots[buf].mGraphicBuffer->handle, returnFlags); return returnFlags; } status_t SurfaceTexture::setSynchronousMode(bool enabled) { ST_LOGV("setSynchronousMode: enabled=%d", enabled); Mutex::Autolock lock(mMutex); if (mAbandoned) { ST_LOGE("setSynchronousMode: SurfaceTexture has been abandoned!"); return NO_INIT; } status_t err = OK; if (!mAllowSynchronousMode && enabled) return err; if (!enabled) { // going to asynchronous mode, drain the queue err = drainQueueLocked(); if (err != NO_ERROR) return err; } if (mSynchronousMode != enabled) { // - if we're going to asynchronous mode, the queue is guaranteed to be // empty here // - if the client set the number of buffers, we're guaranteed that // we have at least 3 (because we don't allow less) mSynchronousMode = enabled; mDequeueCondition.signal(); } return err; } status_t SurfaceTexture::queueBuffer(int buf, int64_t timestamp, uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform) { ST_LOGV("queueBuffer: slot=%d time=%lld", buf, timestamp); sp listener; { // scope for the lock Mutex::Autolock lock(mMutex); if (mAbandoned) { ST_LOGE("queueBuffer: SurfaceTexture has been abandoned!"); return NO_INIT; } if (buf < 0 || buf >= mBufferCount) { ST_LOGE("queueBuffer: slot index out of range [0, %d]: %d", mBufferCount, buf); return -EINVAL; } else if (mSlots[buf].mBufferState != BufferSlot::DEQUEUED) { ST_LOGE("queueBuffer: slot %d is not owned by the client " "(state=%d)", buf, mSlots[buf].mBufferState); return -EINVAL; } else if (buf == mCurrentTexture) { ST_LOGE("queueBuffer: slot %d is current!", buf); return -EINVAL; } else if (!mSlots[buf].mRequestBufferCalled) { ST_LOGE("queueBuffer: slot %d was enqueued without requesting a " "buffer", buf); return -EINVAL; } if (mSynchronousMode) { // In synchronous mode we queue all buffers in a FIFO. mQueue.push_back(buf); // Synchronous mode always signals that an additional frame should // be consumed. listener = mFrameAvailableListener; } else { // In asynchronous mode we only keep the most recent buffer. if (mQueue.empty()) { mQueue.push_back(buf); // Asynchronous mode only signals that a frame should be // consumed if no previous frame was pending. If a frame were // pending then the consumer would have already been notified. listener = mFrameAvailableListener; } else { Fifo::iterator front(mQueue.begin()); // buffer currently queued is freed mSlots[*front].mBufferState = BufferSlot::FREE; // and we record the new buffer index in the queued list *front = buf; } } mSlots[buf].mBufferState = BufferSlot::QUEUED; mSlots[buf].mCrop = mNextCrop; mSlots[buf].mTransform = mNextTransform; mSlots[buf].mScalingMode = mNextScalingMode; mSlots[buf].mTimestamp = timestamp; mFrameCounter++; mSlots[buf].mFrameNumber = mFrameCounter; mDequeueCondition.signal(); *outWidth = mDefaultWidth; *outHeight = mDefaultHeight; *outTransform = 0; } // scope for the lock // call back without lock held if (listener != 0) { listener->onFrameAvailable(); } return OK; } void SurfaceTexture::cancelBuffer(int buf) { ST_LOGV("cancelBuffer: slot=%d", buf); Mutex::Autolock lock(mMutex); if (mAbandoned) { ST_LOGW("cancelBuffer: SurfaceTexture has been abandoned!"); return; } if (buf < 0 || buf >= mBufferCount) { ST_LOGE("cancelBuffer: slot index out of range [0, %d]: %d", mBufferCount, buf); return; } else if (mSlots[buf].mBufferState != BufferSlot::DEQUEUED) { ST_LOGE("cancelBuffer: slot %d is not owned by the client (state=%d)", buf, mSlots[buf].mBufferState); return; } mSlots[buf].mBufferState = BufferSlot::FREE; mSlots[buf].mFrameNumber = 0; mDequeueCondition.signal(); } status_t SurfaceTexture::setCrop(const Rect& crop) { ST_LOGV("setCrop: crop=[%d,%d,%d,%d]", crop.left, crop.top, crop.right, crop.bottom); Mutex::Autolock lock(mMutex); if (mAbandoned) { ST_LOGE("setCrop: SurfaceTexture has been abandoned!"); return NO_INIT; } mNextCrop = crop; return OK; } status_t SurfaceTexture::setTransform(uint32_t transform) { ST_LOGV("setTransform: xform=%#x", transform); Mutex::Autolock lock(mMutex); if (mAbandoned) { ST_LOGE("setTransform: SurfaceTexture has been abandoned!"); return NO_INIT; } mNextTransform = transform; return OK; } status_t SurfaceTexture::connect(int api, uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform) { ST_LOGV("connect: api=%d", api); Mutex::Autolock lock(mMutex); if (mAbandoned) { ST_LOGE("connect: SurfaceTexture has been abandoned!"); return NO_INIT; } int err = NO_ERROR; switch (api) { case NATIVE_WINDOW_API_EGL: case NATIVE_WINDOW_API_CPU: case NATIVE_WINDOW_API_MEDIA: case NATIVE_WINDOW_API_CAMERA: if (mConnectedApi != NO_CONNECTED_API) { ST_LOGE("connect: already connected (cur=%d, req=%d)", mConnectedApi, api); err = -EINVAL; } else { mConnectedApi = api; *outWidth = mDefaultWidth; *outHeight = mDefaultHeight; *outTransform = 0; } break; default: err = -EINVAL; break; } return err; } status_t SurfaceTexture::disconnect(int api) { ST_LOGV("disconnect: api=%d", api); Mutex::Autolock lock(mMutex); if (mAbandoned) { // it is not really an error to disconnect after the surface // has been abandoned, it should just be a no-op. return NO_ERROR; } int err = NO_ERROR; switch (api) { case NATIVE_WINDOW_API_EGL: case NATIVE_WINDOW_API_CPU: case NATIVE_WINDOW_API_MEDIA: case NATIVE_WINDOW_API_CAMERA: if (mConnectedApi == api) { drainQueueAndFreeBuffersLocked(); mConnectedApi = NO_CONNECTED_API; mNextCrop.makeInvalid(); mNextScalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE; mNextTransform = 0; mDequeueCondition.signal(); } else { ST_LOGE("disconnect: connected to another api (cur=%d, req=%d)", mConnectedApi, api); err = -EINVAL; } break; default: ST_LOGE("disconnect: unknown API %d", api); err = -EINVAL; break; } return err; } status_t SurfaceTexture::setScalingMode(int mode) { ST_LOGV("setScalingMode: mode=%d", mode); switch (mode) { case NATIVE_WINDOW_SCALING_MODE_FREEZE: case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW: break; default: ST_LOGE("unknown scaling mode: %d", mode); return BAD_VALUE; } Mutex::Autolock lock(mMutex); mNextScalingMode = mode; return OK; } status_t SurfaceTexture::updateTexImage() { ST_LOGV("updateTexImage"); Mutex::Autolock lock(mMutex); if (mAbandoned) { ST_LOGE("calling updateTexImage() on an abandoned SurfaceTexture"); return NO_INIT; } // In asynchronous mode the list is guaranteed to be one buffer // deep, while in synchronous mode we use the oldest buffer. if (!mQueue.empty()) { Fifo::iterator front(mQueue.begin()); int buf = *front; // Update the GL texture object. EGLImageKHR image = mSlots[buf].mEglImage; EGLDisplay dpy = eglGetCurrentDisplay(); if (image == EGL_NO_IMAGE_KHR) { if (mSlots[buf].mGraphicBuffer == 0) { ST_LOGE("buffer at slot %d is null", buf); return BAD_VALUE; } image = createImage(dpy, mSlots[buf].mGraphicBuffer); mSlots[buf].mEglImage = image; mSlots[buf].mEglDisplay = dpy; if (image == EGL_NO_IMAGE_KHR) { // NOTE: if dpy was invalid, createImage() is guaranteed to // fail. so we'd end up here. return -EINVAL; } } GLint error; while ((error = glGetError()) != GL_NO_ERROR) { ST_LOGW("updateTexImage: clearing GL error: %#04x", error); } glBindTexture(mTexTarget, mTexName); glEGLImageTargetTexture2DOES(mTexTarget, (GLeglImageOES)image); bool failed = false; while ((error = glGetError()) != GL_NO_ERROR) { ST_LOGE("error binding external texture image %p (slot %d): %#04x", image, buf, error); failed = true; } if (failed) { return -EINVAL; } if (mCurrentTexture != INVALID_BUFFER_SLOT) { if (mUseFenceSync) { EGLSyncKHR fence = eglCreateSyncKHR(dpy, EGL_SYNC_FENCE_KHR, NULL); if (fence == EGL_NO_SYNC_KHR) { LOGE("updateTexImage: error creating fence: %#x", eglGetError()); return -EINVAL; } glFlush(); mSlots[mCurrentTexture].mFence = fence; } } ST_LOGV("updateTexImage: (slot=%d buf=%p) -> (slot=%d buf=%p)", mCurrentTexture, mCurrentTextureBuf != NULL ? mCurrentTextureBuf->handle : 0, buf, mSlots[buf].mGraphicBuffer->handle); if (mCurrentTexture != INVALID_BUFFER_SLOT) { // The current buffer becomes FREE if it was still in the queued // state. If it has already been given to the client // (synchronous mode), then it stays in DEQUEUED state. if (mSlots[mCurrentTexture].mBufferState == BufferSlot::QUEUED) { mSlots[mCurrentTexture].mBufferState = BufferSlot::FREE; } } // Update the SurfaceTexture state. mCurrentTexture = buf; mCurrentTextureBuf = mSlots[buf].mGraphicBuffer; mCurrentCrop = mSlots[buf].mCrop; mCurrentTransform = mSlots[buf].mTransform; mCurrentScalingMode = mSlots[buf].mScalingMode; mCurrentTimestamp = mSlots[buf].mTimestamp; computeCurrentTransformMatrix(); // Now that we've passed the point at which failures can happen, // it's safe to remove the buffer from the front of the queue. mQueue.erase(front); mDequeueCondition.signal(); } else { // We always bind the texture even if we don't update its contents. glBindTexture(mTexTarget, mTexName); } return OK; } bool SurfaceTexture::isExternalFormat(uint32_t format) { switch (format) { // supported YUV formats case HAL_PIXEL_FORMAT_YV12: // Legacy/deprecated YUV formats case HAL_PIXEL_FORMAT_YCbCr_422_SP: case HAL_PIXEL_FORMAT_YCrCb_420_SP: case HAL_PIXEL_FORMAT_YCbCr_422_I: return true; } // Any OEM format needs to be considered if (format>=0x100 && format<=0x1FF) return true; return false; } GLenum SurfaceTexture::getCurrentTextureTarget() const { return mTexTarget; } void SurfaceTexture::getTransformMatrix(float mtx[16]) { Mutex::Autolock lock(mMutex); memcpy(mtx, mCurrentTransformMatrix, sizeof(mCurrentTransformMatrix)); } void SurfaceTexture::computeCurrentTransformMatrix() { ST_LOGV("computeCurrentTransformMatrix"); float xform[16]; for (int i = 0; i < 16; i++) { xform[i] = mtxIdentity[i]; } if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_FLIP_H) { float result[16]; mtxMul(result, xform, mtxFlipH); for (int i = 0; i < 16; i++) { xform[i] = result[i]; } } if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_FLIP_V) { float result[16]; mtxMul(result, xform, mtxFlipV); for (int i = 0; i < 16; i++) { xform[i] = result[i]; } } if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_ROT_90) { float result[16]; mtxMul(result, xform, mtxRot90); for (int i = 0; i < 16; i++) { xform[i] = result[i]; } } sp& buf(mSlots[mCurrentTexture].mGraphicBuffer); float tx, ty, sx, sy; if (!mCurrentCrop.isEmpty()) { // In order to prevent bilinear sampling at the of the crop rectangle we // may need to shrink it by 2 texels in each direction. Normally this // would just need to take 1/2 a texel off each end, but because the // chroma channels will likely be subsampled we need to chop off a whole // texel. This will cause artifacts if someone does nearest sampling // with 1:1 pixel:texel ratio, but it's impossible to simultaneously // accomodate the bilinear and nearest sampling uses. // // If nearest sampling turns out to be a desirable usage of these // textures then we could add the ability to switch a SurfaceTexture to // nearest-mode. Preferably, however, the image producers (video // decoder, camera, etc.) would simply not use a crop rectangle (or at // least not tell the framework about it) so that the GPU can do the // correct edge behavior. int xshrink = 0, yshrink = 0; if (mCurrentCrop.left > 0) { tx = float(mCurrentCrop.left + 1) / float(buf->getWidth()); xshrink++; } else { tx = 0.0f; } if (mCurrentCrop.right < int32_t(buf->getWidth())) { xshrink++; } if (mCurrentCrop.bottom < int32_t(buf->getHeight())) { ty = (float(buf->getHeight() - mCurrentCrop.bottom) + 1.0f) / float(buf->getHeight()); yshrink++; } else { ty = 0.0f; } if (mCurrentCrop.top > 0) { yshrink++; } sx = float(mCurrentCrop.width() - xshrink) / float(buf->getWidth()); sy = float(mCurrentCrop.height() - yshrink) / float(buf->getHeight()); } else { tx = 0.0f; ty = 0.0f; sx = 1.0f; sy = 1.0f; } float crop[16] = { sx, 0, 0, 0, 0, sy, 0, 0, 0, 0, 1, 0, tx, ty, 0, 1, }; float mtxBeforeFlipV[16]; mtxMul(mtxBeforeFlipV, crop, xform); // SurfaceFlinger expects the top of its window textures to be at a Y // coordinate of 0, so SurfaceTexture must behave the same way. We don't // want to expose this to applications, however, so we must add an // additional vertical flip to the transform after all the other transforms. mtxMul(mCurrentTransformMatrix, mtxFlipV, mtxBeforeFlipV); } nsecs_t SurfaceTexture::getTimestamp() { ST_LOGV("getTimestamp"); Mutex::Autolock lock(mMutex); return mCurrentTimestamp; } void SurfaceTexture::setFrameAvailableListener( const sp& listener) { ST_LOGV("setFrameAvailableListener"); Mutex::Autolock lock(mMutex); mFrameAvailableListener = listener; } void SurfaceTexture::freeBufferLocked(int i) { mSlots[i].mGraphicBuffer = 0; mSlots[i].mBufferState = BufferSlot::FREE; mSlots[i].mFrameNumber = 0; if (mSlots[i].mEglImage != EGL_NO_IMAGE_KHR) { eglDestroyImageKHR(mSlots[i].mEglDisplay, mSlots[i].mEglImage); mSlots[i].mEglImage = EGL_NO_IMAGE_KHR; mSlots[i].mEglDisplay = EGL_NO_DISPLAY; } } void SurfaceTexture::freeAllBuffersLocked() { LOGW_IF(!mQueue.isEmpty(), "freeAllBuffersLocked called but mQueue is not empty"); mCurrentTexture = INVALID_BUFFER_SLOT; for (int i = 0; i < NUM_BUFFER_SLOTS; i++) { freeBufferLocked(i); } } void SurfaceTexture::freeAllBuffersExceptHeadLocked() { LOGW_IF(!mQueue.isEmpty(), "freeAllBuffersExceptCurrentLocked called but mQueue is not empty"); int head = -1; if (!mQueue.empty()) { Fifo::iterator front(mQueue.begin()); head = *front; } mCurrentTexture = INVALID_BUFFER_SLOT; for (int i = 0; i < NUM_BUFFER_SLOTS; i++) { if (i != head) { freeBufferLocked(i); } } } status_t SurfaceTexture::drainQueueLocked() { while (mSynchronousMode && !mQueue.isEmpty()) { mDequeueCondition.wait(mMutex); if (mAbandoned) { ST_LOGE("drainQueueLocked: SurfaceTexture has been abandoned!"); return NO_INIT; } if (mConnectedApi == NO_CONNECTED_API) { ST_LOGE("drainQueueLocked: SurfaceTexture is not connected!"); return NO_INIT; } } return NO_ERROR; } status_t SurfaceTexture::drainQueueAndFreeBuffersLocked() { status_t err = drainQueueLocked(); if (err == NO_ERROR) { if (mSynchronousMode) { freeAllBuffersLocked(); } else { freeAllBuffersExceptHeadLocked(); } } return err; } EGLImageKHR SurfaceTexture::createImage(EGLDisplay dpy, const sp& graphicBuffer) { EGLClientBuffer cbuf = (EGLClientBuffer)graphicBuffer->getNativeBuffer(); EGLint attrs[] = { EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE, }; EGLImageKHR image = eglCreateImageKHR(dpy, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID, cbuf, attrs); if (image == EGL_NO_IMAGE_KHR) { EGLint error = eglGetError(); ST_LOGE("error creating EGLImage: %#x", error); } return image; } sp SurfaceTexture::getCurrentBuffer() const { Mutex::Autolock lock(mMutex); return mCurrentTextureBuf; } Rect SurfaceTexture::getCurrentCrop() const { Mutex::Autolock lock(mMutex); return mCurrentCrop; } uint32_t SurfaceTexture::getCurrentTransform() const { Mutex::Autolock lock(mMutex); return mCurrentTransform; } uint32_t SurfaceTexture::getCurrentScalingMode() const { Mutex::Autolock lock(mMutex); return mCurrentScalingMode; } bool SurfaceTexture::isSynchronousMode() const { Mutex::Autolock lock(mMutex); return mSynchronousMode; } int SurfaceTexture::query(int what, int* outValue) { Mutex::Autolock lock(mMutex); if (mAbandoned) { ST_LOGE("query: SurfaceTexture has been abandoned!"); return NO_INIT; } int value; switch (what) { case NATIVE_WINDOW_WIDTH: value = mDefaultWidth; break; case NATIVE_WINDOW_HEIGHT: value = mDefaultHeight; break; case NATIVE_WINDOW_FORMAT: value = mPixelFormat; break; case NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS: value = mSynchronousMode ? (MIN_UNDEQUEUED_BUFFERS-1) : MIN_UNDEQUEUED_BUFFERS; break; default: return BAD_VALUE; } outValue[0] = value; return NO_ERROR; } void SurfaceTexture::abandon() { Mutex::Autolock lock(mMutex); mQueue.clear(); mAbandoned = true; mCurrentTextureBuf.clear(); freeAllBuffersLocked(); mDequeueCondition.signal(); } void SurfaceTexture::setName(const String8& name) { mName = name; } void SurfaceTexture::dump(String8& result) const { char buffer[1024]; dump(result, "", buffer, 1024); } void SurfaceTexture::dump(String8& result, const char* prefix, char* buffer, size_t SIZE) const { Mutex::Autolock _l(mMutex); snprintf(buffer, SIZE, "%smBufferCount=%d, mSynchronousMode=%d, default-size=[%dx%d], " "mPixelFormat=%d, mTexName=%d\n", prefix, mBufferCount, mSynchronousMode, mDefaultWidth, mDefaultHeight, mPixelFormat, mTexName); result.append(buffer); String8 fifo; int fifoSize = 0; Fifo::const_iterator i(mQueue.begin()); while (i != mQueue.end()) { snprintf(buffer, SIZE, "%02d ", *i++); fifoSize++; fifo.append(buffer); } snprintf(buffer, SIZE, "%scurrent: {crop=[%d,%d,%d,%d], transform=0x%02x, current=%d}\n" "%snext : {crop=[%d,%d,%d,%d], transform=0x%02x, FIFO(%d)={%s}}\n" , prefix, mCurrentCrop.left, mCurrentCrop.top, mCurrentCrop.right, mCurrentCrop.bottom, mCurrentTransform, mCurrentTexture, prefix, mNextCrop.left, mNextCrop.top, mNextCrop.right, mNextCrop.bottom, mNextTransform, fifoSize, fifo.string() ); result.append(buffer); struct { const char * operator()(int state) const { switch (state) { case BufferSlot::DEQUEUED: return "DEQUEUED"; case BufferSlot::QUEUED: return "QUEUED"; case BufferSlot::FREE: return "FREE"; default: return "Unknown"; } } } stateName; for (int i=0 ; i":" ", i, stateName(slot.mBufferState), slot.mCrop.left, slot.mCrop.top, slot.mCrop.right, slot.mCrop.bottom, slot.mTransform, slot.mTimestamp ); result.append(buffer); const sp& buf(slot.mGraphicBuffer); if (buf != NULL) { snprintf(buffer, SIZE, ", %p [%4ux%4u:%4u,%3X]", buf->handle, buf->width, buf->height, buf->stride, buf->format); result.append(buffer); } result.append("\n"); } } static void mtxMul(float out[16], const float a[16], const float b[16]) { out[0] = a[0]*b[0] + a[4]*b[1] + a[8]*b[2] + a[12]*b[3]; out[1] = a[1]*b[0] + a[5]*b[1] + a[9]*b[2] + a[13]*b[3]; out[2] = a[2]*b[0] + a[6]*b[1] + a[10]*b[2] + a[14]*b[3]; out[3] = a[3]*b[0] + a[7]*b[1] + a[11]*b[2] + a[15]*b[3]; out[4] = a[0]*b[4] + a[4]*b[5] + a[8]*b[6] + a[12]*b[7]; out[5] = a[1]*b[4] + a[5]*b[5] + a[9]*b[6] + a[13]*b[7]; out[6] = a[2]*b[4] + a[6]*b[5] + a[10]*b[6] + a[14]*b[7]; out[7] = a[3]*b[4] + a[7]*b[5] + a[11]*b[6] + a[15]*b[7]; out[8] = a[0]*b[8] + a[4]*b[9] + a[8]*b[10] + a[12]*b[11]; out[9] = a[1]*b[8] + a[5]*b[9] + a[9]*b[10] + a[13]*b[11]; out[10] = a[2]*b[8] + a[6]*b[9] + a[10]*b[10] + a[14]*b[11]; out[11] = a[3]*b[8] + a[7]*b[9] + a[11]*b[10] + a[15]*b[11]; out[12] = a[0]*b[12] + a[4]*b[13] + a[8]*b[14] + a[12]*b[15]; out[13] = a[1]*b[12] + a[5]*b[13] + a[9]*b[14] + a[13]*b[15]; out[14] = a[2]*b[12] + a[6]*b[13] + a[10]*b[14] + a[14]*b[15]; out[15] = a[3]*b[12] + a[7]*b[13] + a[11]*b[14] + a[15]*b[15]; } }; // namespace android